Slotting jig



Dec. 20, 1949 A L J. ARABlAN 24-9,470

SLOTTING JIG Filed Jan. 10, 1946 1N VEN TUR. JAC/f J' A845/wv Patented Dec. 20, 1949 UNITED sTArss ENT OFFICE (Granted under the act of March 3, 1883., as ,amended April 3G, 1928; 370 0. G. 757) 4 Claims.

This invention relates to a slotting jig, and more specifically to a jig for slotting small articles vsuch as screws, for example, by means of a metal saw.

An object of this invention is to provide :a device for holding a small article during a slotting operation by a metalA saw, and for ejecting the article from the jig when the slotting operation is completed.

A further object of this invention is to provide a jig that operates to hold a small article or workpiece firmly, and to guide the 'saw or other cutting tool to the work-piece during the sawing or slotting oper-ation.

Another object is to provide a jig for holding in Figure l, and

Figure 3 is a cross-section taken on the line 3-3 of Figure l.

The jig shown in the drawing comprises a solid body portion II having a longitudinal slot I2 extending along the center line of the end surface as shown in Figure 2.

The body portion Il has a bore I3 extending from the face thereof that includes the slot I2 through the body to the opposite face, the slot being disposed diametrically of the bore.

A plunger i4, having a handle I5, fits the bore I3 and is mounted to slide therein. The bore i3 is enlarged slightly at I6 t0 provide for longitudinal movement of the stop pin I1 which extends transversely thru the plunger I4. Spring 2| urges the plunger I4 in the direction of the handle I and away from slot I2, but the stop pin I'I limits the movement of plunger I4 by abutting against the bushing I8 which is threaded into the outer end of the enlarged bore portion I6.

The end of the plunger I4 opposite the handle I5 has a small socket or bore I9 which, in the embodiment shown, is adapted to receive the threaded portion of a small machine screw and hold the screw positioned in the bore I3, as shown in dotted lines in Figure 1. The end of the plunger I4 that contains the socket I9 is 25 Figure 2 is an end elevation of the device shown` located in the bore i3 by the spring 'El acting opposed to the locating `stop zI'I to position the work-piece for the machining operation. The slot ifi is thus located to operate as a guide for the saw blade or other machining .tool that is employed to machine the slot in the work-piece The size of bore i3 and the socket I9 can be modiiied to adapt .the device for holding Aa large variety of small work-pieces or other objects.

In the use of the device a .small object such as the machine screw 2li is inserted in the socket it whereby it is held `in .the bore 1:3. The jig is held in operative position with reference to a saw .L or other cutting tool, whereby the slot l2 acts to guide the saw into cutting engagement with the head of machine screw 2t. The screw 20 is snugly and iirmly held in position and the slot I2 assures that the cut is accurately made on a true diameter of the screw head.

When the slot has been completed in the screw head the plunger is pushed outwardly by means of handle I5 against the action of spring 2l While the screw 20 is still held by small bore i9 but with the head projecting slightly above the face of the jig body II, any iinishing operations can be performed on the head.

Further movement of plunger I4 will eject the screw or other small object from the jig. If this movement of the plunger is made with suicient force the object can be completely dislodged from small bore I9 and expelled into a convenient receptacle.

Modifications and changes may be made in the above-described device without departing from the spirit and scope of this invention as set forth in the appended claims.

The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment fof any royalties thereon or therefor.

What is claimed is:

1. A jig comprising a body, a bore extending through the body from end to end thereof, a slot in a face of the body at one end of the bore and disposed diametrically of the bore, an enlarged bore extending from the bore to the other end of the body, a bushing threadedlyengaging the outer end of the enlarged bore, a plunger slidably mounted in the bore and the bushing, a handle on the end of the plunger adjacent the bushing, a spring encircling the plunger between the handle and the bushing and a pin extending tzransversely thru the portion of the plunger within the enlarged bore.

2. A jig comprising a body, a bore extending through the body from end to end thereof, a slot in a face of the body at one end of the bore and disposed diametrically of the bore, an enlarged bore extending from the bore to the other end of the body, a bushing threadedly engaging the outer end of the enlarged bore, a plunger slidably mounted in the bore and the bushing, a handle on the end of the plunger adjacent the bushing, a spring encircling the plunger between the handle and the bushing, a pin extending trans- Versely thru the portion of the plunger within the enlarged bore, and a small bore in the outer end of the plunger adjacent the slot.

3. A jig comprising a body, a bore extending through the body from end to end thereof, a slot in a face of the body at one end of the bore and disposed diametrically :of the bore, an enlarged bore extending from the bore to the other end of the body, a bushing threadedly engaging the other end of the enlarged bore, a plunger slidably mounted in the bore and the bushing, a handle on the end of the plunger adjacent the bushing, a spring encircling the plunger between the handle and the bushing, a pin extending transversely thru the portion of the plunger within the enlarged bore, a small bore in the outer end of the plunger adjacent the slot, the outer end of the plunger being normally urged by the spring to a position within the bore and the outer end being moveable outwardly of the bore.

4. A jig for machining a work-piece comprising a body, a bore extending through the body and adapted to receive a workpiece, a plunger fitting the bore and extending therethrough to project out of one end thereof, a handle on the plunger at its projecting end, the other end of the plunger comprising an attachment for the workpiece operable to hold it positioned in the bore for the machining operation, a stop and an actuating device operating opposed to the stop to locate the end of the plunger that holds the workpiece to position the workpiece for the machining operation, a guideWay in the face of the base that contains the workpiece operable to guide the tool thereto for the machining operation.

JACK J. ARABIAN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS (AdditiOn to 675,648) 

